Project Report on Electronic Energy Meter And Flasher

Energy meter is a Devices which is precisely used in the Distribution of current and voltage from main line to the consumer ends domestic as well as Industrial and it is installed in between the Distribution line. In regard to Energy Electronic Meter the vital considerations of significance are CT Ratio (Current Rating) PT Ratio (voltage Rating) VA (Burden Load) Accuracy or Precision construction Features Functional features of the meter ie, whether it is multifunctional or normal meter. To measure energy, three other quantities have to be known: voltage, current and time. The voltage and current delivered by a generator to a load are measured relative to time with the aid of a microcontroller, which consists of an analogue-to-digital (A-D) convertor with switched inputs and a timer. The current is measured by passing it through a shunt resistor that converts it into a directly proportional voltage. The resistor is shown for clarity only: in practice it is part of the meter. The range of input voltages is determined by a series resistor that also provides current are applied to the controller, they are amplified and rectified. Their polarity is determined by a comparator whose output is linked to a digital input of the controller. This arrangement makes it appear as if the A-D conversion were upgraded from eight to nine bits.